STARTING AND OPERATING THE VEHICLE AIR SUSPENSION HEIGHT/AIR PRESSURE
Regional Haul
(R05/10) Y53-6033 – 131 –
Follow this procedure to temporarily set ride height.
WARNING! To prevent possible death, injury
and damage to property, ensure that a vehicle
is parked and the wheels chocked before
beginning this procedure.
CAUTION: Completing this procedure will
enable you to safely reach the nearest autho-
rized Peterbilt repair facility to have ride
height and pinion angle reset using the
proper equipment and technique. Do this as
soon as possible to avoid potential driveline
damage.
NOTE: Suitable wheel chocks are at a minimum
an 18-inch (46 cm) long 4x4.
1. Ensure that the air supply and delivery plumbing of
the height control valve is consistent with the illustra-
tion.
NOTE: At least one of the mounting holes in the
height control valve bracket will be slotted to per-
mit rotating the valve.
NOTE: On dual-valve systems, begin with the LH
valve on the next step.
Ride Height Measurement (Location for Tandem Axles Shown)
Proprietary Rear
Air Suspension
Ride Height [inches (mm)]*
Single Drive Tandem Drive
Air Trac 11.00 (279) 11.00 (279)
Low Air Leaf 6.50 (165) 8.50 (216)
*These values are for a fully laden vehicle
